What should disperse dyes pay attention to when dyeing?

What should disperse dyes pay attention to when dyeing?

Pay attention to prevent dye migration during pre baking and baking. The hot melt baking stage is an important stage for the transfer of disperse dyes on cotton to polyester. The appropriate hot melt temperature and time should be selected according to the heat resistance of the dye, that is, the sublimation fastness of the dye. In the actual dyeing, the dye transfer cannot be complete. There is always some dye left on the cotton, resulting in the staining of the cotton. The post dyeing treatment can be carried out by reducing cleaning or soaping. If the cotton part needs to be dyed after the hot-melt dyeing, the post-treatment can be selected after the dyeing.

High temperature and high pressure dyeing of disperse dyes can be carried out on high temperature and high pressure jigger, jet and overflow dyeing machine. It is suitable for dyeing deep and thick color. The dyeing pH value is generally controlled at 5 ~ 6. Acetic acid and ammonium dihydrogen phosphate are commonly used to adjust the pH value. In order to keep the dye bath stable, please ask the precautions for disperse dye dyeing. Dispersant and high-temperature leveling agent need to be added during dyeing.